added and augmented unit tests to ensure we don't get any lexer escape sequence parsing regression weirdness; **also note the special section in there where we inspect and nuke a 'legal' lexer rule `\b` which would otherwise cause a serious "infinite loop" condition by outputting an infinite stream of tokens for certain inputs:: where the `\b` lexer rule would precede any other input matching lexer rules and the `\b` lexer rule in itself DOES NOT EXPLICITLY FORWARD the input cursor -- as in the given test examples.
added and augmented unit tests to ensure we don't get any lexer escape sequence parsing regression weirdness; **also note the special section in there where we inspect and nuke a 'legal' lexer rule `\b` which would otherwise cause a serious "infinite loop" condition by outputting an infinite stream of tokens for certain inputs:: where the `\b` lexer rule would precede any other input matching lexer rules and the `\b` lexer rule in itself DOES NOT EXPLICITLY FORWARD the input cursor -- as in the given test examples.

GerHobbelt/jison,GerHobbelt/jison,GerHobbelt/jison,GerHobbelt/jison